Rod-Bound Tool Coupling Unit With Segmented Force Transmission
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Solution Overview
Problem
Existing connecting devices for tools, particularly rod-bound garden tools, face challenges in providing a reliable and secure transmission of driving forces while preventing mechanical overload and ensuring a long-lasting coupling.
Innovation Solution
The connecting device features a coupling unit with two opposite coupling points that automatically transition into a coupled state, distributing forces evenly and incorporating resilient coupling elements and a triggering unit for easy release, allowing for flexible orientation and durable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single coupling point is used, then the device complexity is reduced, but the reliability of force transmission deteriorates due to uneven force distribution and mechanical overload
Solution Approach 1:
The coupling unit is segmented into multiple coupling points (at least two opposing coupling points) that independently transmit force. This segmentation distributes the transmission of driving forces across multiple locations, preventing mechanical overload at any single point while maintaining overall system reliability.
Solution Approach 2:
Each coupling point is designed with specific local characteristics to optimize force transmission at its location. The opposing coupling points are positioned to handle different directional forces, with each point's geometry and material properties tailored to its specific loading conditions, thereby improving overall reliability without requiring complete redesign of the entire coupling unit.
2Reliability
If resilient coupling elements are added, then the reliability and durability of the coupling is improved, but the device complexity increases
Solution Approach 1:
Resilient coupling elements are introduced to provide dynamic adaptation to loading conditions. These elastic elements can deform under force to accommodate misalignment and then return to their original position, maintaining reliable force transmission while reducing the risk of mechanical overload and extending coupling durability.
Solution Approach 2:
The resilient coupling elements serve as a form of beforehand cushioning by absorbing and distributing mechanical shocks and stresses before they can cause damage to the rigid coupling structure. This protective function enhances the overall durability of the coupling without requiring complex protective mechanisms.
3Ease of operation
If automatic coupling transition is implemented, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The coupling elements are pre-positioned and configured so that when the connecting pieces are brought together, the coupling automatically engages without requiring additional manual intervention. The geometry and elasticity of the coupling elements ensure that the transition from uncoupled to coupled state occurs automatically as part of the assembly process.
Solution Approach 2:
The coupling mechanism is designed to self-activate through the relative movement of the connecting pieces. The resilient elements automatically deform and lock into place when the pieces are joined, eliminating the need for separate coupling operations and reducing the skill level required for assembly while maintaining reliable force transmission.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design ensures a reliable, secure, and long-lasting transmission of driving forces, effectively counteracting mechanical overload and providing easy operation and maintenance, enhancing the tool's durability and usability.
Implementation Method 1
incorporating resilient coupling elements
Data Source
Figure 1a~1c
Figure 2
Figure 3a
AI summary
The invention relates to a connecting device (10a, 10a'; 10b; 10c; 10d) for a tool (12a), in particular a rod-bound tool, preferably a machine tool, or for a tool system (50a; 50b; 50c; 50d), with at least one connecting piece (14a, 14a'; 14b; 14c; 14d) for connecting to a further connecting piece (16a, 16a`; 16b; 16c; 16d), with a fastening unit (18a; 18b; 18c; 18d) for fastening the connecting pieces (14a, 14a', 16a, 16a'; 14b, 16b; 14c, 16c; 14d, 16d) to one another and with a coupling unit (20a; 20b; 20c; 20d), which is intended, at least in a coupled state, to transmit a driving force, in particular a tensile and/or a compressive force, between the connecting pieces (14a, 14a', 16a, 16a'; 14b, 16b; 14c, 16c; 14d, 16d).It is proposed that the coupling unit (20a; 20b; 20c; 20d) has at least two opposing coupling points (22a, 24a; 22b; 22d, 24d) for coupling with a negative coupling unit (26a; 26b; 26c; 26d) of the further connecting piece (16a; 16b; 16c; 16d).